protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
using (WebContext db = new WebContext())
{
var Name = validationContext.MemberName;
if (string.IsNullOrEmpty(Name))
{
var displayName = validationContext.DisplayName;
var prop = validationContext.ObjectInstance.GetType().GetProperty(displayName);
if (prop != null)
{
Name = prop.Name;
}
else
{
var props = validationContext.ObjectInstance.GetType().GetProperties().Where(x => x.CustomAttributes.Count(a => a.AttributeType == typeof(DisplayAttribute)) > 0).ToList();
foreach (PropertyInfo prp in props)
{
var attr = prp.CustomAttributes.FirstOrDefault(p => p.AttributeType == typeof(DisplayAttribute));
var val = attr.NamedArguments.FirstOrDefault(p => p.MemberName == "Name").TypedValue.Value;
if (val.Equals(displayName))
{
Name = prp.Name;
break;
}
}
}
}
// PropertyInfo IdProp = typeof(User).GetProperties().FirstOrDefault(x => x.CustomAttributes.Count(a => a.AttributeType == typeof(KeyAttribute)) > 0);
//int Id = (int)IdProp.GetValue(validationContext.ObjectInstance, null);
Type entityType = typeof(User);
var result = db.Set(entityType).Where(Name + "==@0", value);
int count = 0;
/* if (Id > 0)
* {
* result = result.Where(IdProp.Name + "<>@0", Id);
* }*/
count = result.Count();
if (count == 0)
{
return(ValidationResult.Success);
}
else
{
return(new ValidationResult(ErrorMessageString));
}
}
}